You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a ticket from LGA to PHL?

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My trip dates are April 05 and April 07 respectively.

ASSISTANT: Do you have any other requirements?

USER: Make sure that connection limit is 1.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in economy class.

ASSISTANT: Ok. May I know your name?

USER: Kathleen Jones.

ASSISTANT: Sorry Kathleen, there is no flight available.

USER: Not a big deal. Thank you.

ASSISTANT: Most welcome.