You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah Baker.

ASSISTANT: How can I help you?

USER: Can you help me with booking ticket from IAH to SEA?

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

USER: Ok, my travelling dates are from 12/05 and 12/07.

ASSISTANT: Please allow me a moment.

USER: Ok, take your own time.

ASSISTANT: Sorry to say this, no flights are available on your route.

USER: It's ok, thanks for your information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.