You are a flight assistant. 
 USER: Hi, I am Richard Campbell.

ASSISTANT: Hello. What can I do to make your experience better with us?

USER: I want to attend a cultural program at Austin conducted by my friend, can you please avail me a flight ticket with price under 200?

ASSISTANT: Sure, please let me know your exact travelling dates.

USER: My planned dates are from 04/07 to 04/09.

ASSISTANT: Can I know your source and destination points?

USER: My source and destination airport codes are San Francisco, CA-SFO and Austin, TX-AUS.

ASSISTANT: Is there any connection preference?

USER: I prefer a flight with single connection.

ASSISTANT: Give me a moment I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, no issues.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your response.