You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I need to book a flight ticket to DTW form IAH, can you please help me in reservation?

ASSISTANT: Sure, please help me with your travelling dates.

USER: My travel dates are from Jun 16 to Jun 18.

ASSISTANT: Do you prefer either business or economy class?

USER: I am comfortable to travel in any class.

ASSISTANT: If you have any other preference related to your journey, please let me know.

USER: Sure, I am comfortable to travel any flight with fare 1000.

ASSISTANT: Thank you for your details, I am sorry to inform you that there are no flights available on given dates from you.

USER: Ok, no problem. Thank you.

ASSISTANT: For the record purpose, may I know your name please?

USER: I am Gary Wright.

ASSISTANT: Thank you, hope to serve you better next time.