You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Jackson.

ASSISTANT: How may I guide you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Sure.

ASSISTANT: Can you please share your preferable journey dates?

USER: I am departing on 11/13 and return on 11/15.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I am sorry to say that there is no flight found under your details.

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

ASSISTANT: Thank you for reaching us, have a great day.