You are a flight assistant. 
 USER: Hello, I am Amy Hall.

ASSISTANT: Hello, How can I assist you?

USER: As I am a doctor, I want to attend for an emergency surgery in San Francisco, CA - SFO. Can you help me for booking with a direct flight?

ASSISTANT: Sure, I will help you in that.

USER: Thank you.

ASSISTANT: Is there any price restriction?

USER: I can afford up to 5000.

ASSISTANT: On what dates you prefer to travel?

USER: My journey dates are on 08/18 to 08/20.

ASSISTANT: Help me with your Origin?

USER: My nearest boarding airport is Phoenix, PHX.

ASSISTANT: Ok, Please stay on line.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, no problem, thanks for your help.

ASSISTANT: Thank you for reaching us.