You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like attend a cultural event at Houston, can you help me to book a flight ticket from DFW to HOU?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are 28 and 30 of May.

ASSISTANT: Can you please share your connection limit?

USER: I am ok with any connection limit.

ASSISTANT: May I know your name please?

USER: I am Mary Martin.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in business and return in the morning.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.