You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Christine Miller. I am looking for a flight from IAD to IAH, can you help me out please?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from 07/14 till 07/16.

ASSISTANT: Please give me a moment. Sorry, no flights are available on your route.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a nice day.