You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am John Nelson. Can you please help me in booking a flight ticket from PHL to CLT?

ASSISTANT: Sure, help me with the trip dates?

USER: I would like to fly on Feb 05 and return on Feb 07.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Sorry, no flights were available at this moment.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.