You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Parker.

ASSISTANT: How may I assist you today?

USER: I have a plan to attend a live music concert in DFW, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will try to help you to book a flight ticket.

USER: Thank you.

ASSISTANT: Please provide me your travel dates to search best flight for you.

USER: Sure, my travelling airport abbreviates are from IAH to DFW.

ASSISTANT: Please share your travel dates also.

USER: I want to egress on 06/10 and my return will be on 06/12.

ASSISTANT: Wait for a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for your waiting, I could not find any flight with your travel dates.

USER: That's ok, I will choose other way to reach my destination on time.

ASSISTANT: It's ok. Thanks for choosing us.