You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas Rodriguez.

ASSISTANT: How may I guide you today?

USER: I want to book a ticket from CLT to PHL, to meet my who are living in Philadelphia.

ASSISTANT: I will help you with that, can you please share your journey dates?

USER: Sure, my travelling dates are 04/27 and 04/29.

ASSISTANT: Wait for a while.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.