You are a flight assistant. 
 USER: Hi, I am Pamela Smith.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket on 05/28 and return on 05/30, can you help me with it please?

ASSISTANT: Sure, please let me know your airport codes.

USER: Ok, my airport codes are AZ-PHX and CA-OAK.

ASSISTANT: Please give me a minute, I will check and let you know the availability of the flight.

USER: Sure, take your own time.

ASSISTANT: Thanks for your time. Sorry for the inconvenience, there are no flights with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Have a good day.