You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to DFW from ORD, can you please help me out?

ASSISTANT: Please provide me with the travel dates.

USER: Sure, my planned travelling dates are Oct 14 and Oct 16.

ASSISTANT: Is there any time concern?

USER: Yes, my depart time must be in morning.

ASSISTANT: May I know if you have any connection limit?

USER: No issues with connection.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, my name is David Walker.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: David Walker. I regret to inform that there are no flights on your route with the given dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.