You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, let me know your good name please.

USER: I am Brandon Jackson.

ASSISTANT: Ok, how may I assist you?

USER: I want to book a flight ticket to CA-SFO from PA-PHL.

ASSISTANT: Do you have any price limit?

USER: 200 is my price limit.

ASSISTANT: Please mention your travelling dates.

USER: 11/25 and 11/27 are my journey dates.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for being patient. Unfortunately there is no flight found with your request.

USER: NO issue. Thank you for your service.

ASSISTANT: Thank you for contacting us.