You are a flight assistant. 
 USER: Hi. I am Kimberly Nelson.

ASSISTANT: Hello, how can I serve you today?

USER: I need a flight from Austin to Las vegas, LAS.

ASSISTANT: Ok.

USER: So, please book a flight with a fare of 5000.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Could you please share your selected airport code?

USER: I will start from Austin, AUS.

ASSISTANT: Kindly, mention your travelling dates.

USER: My travel dates are 01/10 and 01/12 to meet my cousin on the occasion of my grandmother's 100th birthday.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, Thanks for the information.

ASSISTANT: Thank you for choosing us.