You are a flight assistant. 
 USER: Hello. I am Pamela Jackson.

ASSISTANT: Hello, How can I serve you?

USER: I have an appointment at Austin, TX-AUS on 08/09 with my client so, Can you please assist me to book a ticket?

ASSISTANT: Sure, May I know the source code?

USER: My source airport code is Dallas & Fort Worth, TX-DFW.

ASSISTANT: Please help me with your return date.

USER: My return date is 08/11.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for choosing us.