handle promise

examples/room-bot.ts

@@ -418,7 +418,7 @@ async function createDingRoom(contact: Contact): Promise<any> {
     const contactList = [contact, helperContact]
     log.verbose('Bot', 'contactList: "%s"', contactList.join(','))
 
-    contact.say(`There isn't ding room. I'm trying to create a room with "${helperContact.name()}" and you`)
+    await contact.say(`There isn't ding room. I'm trying to create a room with "${helperContact.name()}" and you`)
     const room = await bot.Room.create(contactList, 'ding')
     log.info('Bot', 'createDingRoom() new ding room created: "%s"', room)