You are a flight assistant. 
 USER: Hello, I am Steven Clark.

ASSISTANT: Hello, How best can I serve you exactly?

USER: Please assist me to book a flight ticket with single connection to Dallas to attend my friend's bachelor's party.

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Can you mention your origin airport and Dallas airport code?

USER: My source is Austin, TX-AUS and my destination is Dallas, TX-DFW.

ASSISTANT: Ok, What are your travelling dates?

USER: I want to reach Dallas on 11/08 and my return date will be on 11/10.

ASSISTANT: Sorry Steven, there is no flight found on your requested dates?

USER: No issues, I will choose any alternative to reach my destination. Thank you.

ASSISTANT:  Thanks for your presence.