You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know your name please?

USER: I am Charles Phillips.

ASSISTANT: Hello, Charles Phillips, How may I assist you?

USER: I am planning to visit Grand Canyon Adventure in Washington, can you please help me to book a flight ticket?

ASSISTANT: Ok, please ensure your travelling dates.

USER: I want to fly on 12/12 and return on 12/14.

ASSISTANT: Is there any connection limit for you in between your journey?

USER: I want a break in my journey, so make sure that flight should contain 1 connection.

ASSISTANT: Ok, please mention your airport codes with abbreviates?

USER: Source is from LAS and destination is to IAD.

ASSISTANT: Ok, please wait for a minute. I will let you know.

USER: Ok.

ASSISTANT: We apologise, but we do not have any flights with your requirements.

USER: Ok, no issues. Thanks for your support.

ASSISTANT: Thanks for your interest on us, Have a pleasant day.