You are a flight assistant. 
 USER: Hi, I am Joseph Lewis.

ASSISTANT: Hello, how can I provide assistance to you?

USER: As I have got an invitation for Golden west beer tour which is at Oakland, so I want to travel on 01/13 and return on 01/15. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, I am glad to help you. Please let me know how much you can afford for this journey?

USER: Sure, I need a ticket with price under 500.

ASSISTANT: Can you please help me by providing  your airport codes to proceed further?

USER: Yes, I have planned to travel from Houston, TX-IAH to CA-OAK.

ASSISTANT: Ok, please give me a minute so that I will check the availability of flights and get back to you with the flight details.

USER: Sure, take your own time.

ASSISTANT: Thanks for your valuable time, we found a flight with Delta airlines and price is 100 with single connection in between the journey. Shall I proceed with booking?

USER: Yes, please proceed with this airline.

ASSISTANT: Your ticket has been reserved and flight number is 1008.

USER: Thank you for the help.

ASSISTANT: Your E-ticket has been sent to your email id, Thanks for reaching us.