You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Catherine White. I am planning to travel from IAH to PHL, can you please help me in booking a flight?

ASSISTANT: Sure, I am here to help you. May I know travelling dates to proceed further?

USER: My travelling dates are 08/23 to 08/25.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform you, there are no flights available for you in this route.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.