You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to attend a marriage in Dallas, can you please reserve a flight ticket with direct flight?

ASSISTANT: May I know your itinerary dates please?

USER: My journey dates are on Jan 26th and 28th.

ASSISTANT: To proceed further I need your source and destination codes.

USER: My airport codes are, AUS to DFW.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No, I don't have any other specifications.

ASSISTANT:  May I know your name for the documentation process?

USER: My name is Brenda Rodriguez.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome Brenda Rodriguez.