You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Hall.

ASSISTANT: How can I aid you?

USER: I planned to meet my friend in ORD, can you please help me to book a flight ticket from IAH?

ASSISTANT: Sure, may I know your journey dates please?

USER: I prefer to travel on 11/05 and 11/07.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Jason Hall, there are no flights available in your route.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for reaching us.