You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amanda Thomas here.

ASSISTANT: How can I assist you today?

USER: Could you book my ticket from IAH to IAD?

ASSISTANT: Sure, I need to know your travelling dates?

USER: My trip dates are 01/11 and 01/13.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your desired route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.