You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you at this moment?

USER: I am planning to attend a comic con in Dallas, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your good name please?

USER: I am Scott Hall.

ASSISTANT: Ok, can you please provide your travelling dates?

USER: Sure, I am planning to start my journey on Jan 26th and my return date will be on Jan 28th.

ASSISTANT: Do you prefer business or economy class?

USER: I want to fly with the economy class ticket for this time.

ASSISTANT: Do you have any time preference?

USER: I prefer to fly in the evening.

ASSISTANT: May I know your airport codes?

USER: My boarding and landing airport codes are DTW and DFW.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, I'll choose any alternative to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.