You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Christopher Smith. I would like to book a ticket from CLT to IAH to attend seminar, can you help me in booking?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am departing on Mar 27 and return on Mar 29.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with connection limit 1.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I want to depart in evening and return on afternoon time.

ASSISTANT: Is there any class preference?

USER: I am ok with any class, but I need a normal-cost flight.

ASSISTANT: Thanks for your details, there are no flights found on your data.

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

ASSISTANT: Thank you.