You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: Please reserve a ticket with the name of Mark Nelson under the price limit of 200.

ASSISTANT: Sure. May I know your travelling dates?

USER: Travelling dates are on 12/09 and 12/11.

ASSISTANT: Can you share me your airport codes?

USER: Having the little sugar creek green-way (hiking trails) at the Charlotte, CLT. I have to fly from Seattle, SEA to view this.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Fine.

ASSISTANT: There is no flights found on your data.

USER: Not a issue. Thank you for availing me.

ASSISTANT: Thank you.