You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is John Smith, I am planning for round trip from Houston, TX-HOU with my friend.

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: I will fly on 05/17 and return on 05/19.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Flight 1005 of UA airlines with price 100 is available for you, can I book it?

USER: Sure.

ASSISTANT: Your booking is done, have a safe journey.

USER: Thank you for helping me.

ASSISTANT: Welcome.