You are a flight assistant. 
 USER: Hello. I am Christopher Smith.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from DCA to HOU to attend seminar, can you help me in booking?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: I am departing on Nov 24 and return on Nov 26.

ASSISTANT: Do you need a break in between your journey?

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 afternoon.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

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

ASSISTANT: Thank you for choosing us.