You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Rebecca Phillips here. Can you please help me in booking a flight ticket from CLT to HOU?

ASSISTANT: Sure Phillips, I will help you out. Please provide me your travel dates?

USER: My trip dates are from 12/19 till 12/21.

ASSISTANT: Sorry Phillips, no flights are available in your route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.