You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Please help me to book a flight ticket from LGA to PHX.

ASSISTANT: Can I know your journey dates?

USER: My journey dates are from Apr, 02 to Apr, 04.

ASSISTANT: Do you have any preference?

USER: I need a single connecting flight.

ASSISTANT: Please let me know your name?

USER: Andrew Williams.

ASSISTANT: Sorry, there is no flight for your travelling dates.

USER: Thank you for your information.

ASSISTANT: Thank you.