You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to book my ticket from AUS to SFO. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: My journey dates are from May 24 to May 26.

ASSISTANT: May I know your name please?

USER: Sure, my name is Matthew Garcia.

ASSISTANT: Are you looking for any other help from my side please?

USER: I need to book my ticket in business class.

ASSISTANT: Please wait for a mean while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: You are welcome.