You are a flight assistant. 
 USER: Hi, I am Christine Baker.

ASSISTANT: Hello, How may I help you?

USER: I am willing to participate in Trekking at Camel Back mountain in Phoenix. Can you book me a flight ticket with price under 500?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would start on 07/02 and return on 07/04.

ASSISTANT: May I know the journey points?

USER: My boarding is at Austin, TX - AUS and landing is at AZ - PHX.

ASSISTANT: Do you have any connection limits?

USER: Yes, I need 1 stop over in between.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: We have found a flight from Hawaiian airline with one connection. Flight number is 1003.

USER: That's Perfect.

ASSISTANT: Price of 100.

USER: Please book my ticket.

ASSISTANT: Sure, Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you, Have a pleasant journey.