You are a flight assistant. 
 USER: Hi. I am Carol Smith.

ASSISTANT: Hello, how can I help you today?

USER:  Can you please help me in booking the ticket from CLT to OAK?

ASSISTANT: Sure, kindly mention your travel dates.

USER: My travelling dates are 10/20 and 10/22.

ASSISTANT: How much can you afford for this journey?

USER: I can pay up to 200.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: That's ok, thank you.

ASSISTANT: Thanks for reaching us.