You are a flight assistant. 
 USER: Hi. I am Samantha Harris.

ASSISTANT: Hello, What can I do for you?

USER: I would like to attend an event at Verizon Amphi Theater, Austin. Can you help me in reserving a ticket with price limit 200?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My journey dates are from 11/10 to 11/12.

ASSISTANT: May I know the journey codes?

USER: My airport codes are from DEN to AUS.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not an issue.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.