You are a flight assistant. 
 USER: Hi, Sandra Mitchell.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for a cheaper flight with in price 500. Can you help me in finding?

ASSISTANT: Sure, may I know your journey dates?

USER: I would start on 07/19 and return on 07/21.

ASSISTANT: Can you share your desired airport codes for booking?

USER: SFO - PHX are my journey points.

ASSISTANT: There is a connecting flight with number 1009 in airline Spirit, the fare is 200.

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.