You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you for today?

USER: I want to book a ticket from IAH to PHX, can you help me?

ASSISTANT: Yes, I can help you. Can you share me your travelling dates?

USER: My trip dates are 01/25 and 01/27.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates. Can I know your name?

USER: I am Christopher Johnson.

ASSISTANT: Thank you for reaching our agency.

USER: No problem, thanks for checking.