You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Janet Thomas, I have to visit science lab in Phoenix for my project work. Can you please book a flight ticket from LGA to PHX?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I would like to fly on 02/26 and return on 02/28.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight available.

USER: Sure, take your time.

ASSISTANT: Sorry to say this Janet, there are no flights available on your requested dates. Sorry for the inconvenience provided.

USER: It's ok. Thank you for your response.

ASSISTANT: Thank you for reaching us, have a good day.