You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Scott.

ASSISTANT: How may I aid you today?

USER: I am planning to travel from PHL to LGA. Can you please help me to book a ticket with single connection flight?

ASSISTANT: Sure, I am glad to help you in booking process. Could you please share your travel dates?

USER: My travelling dates will be on Sept 6 to Sept 8.

ASSISTANT: Do you have any specification?

USER: My departure time should be afternoon and return time should be morning.

ASSISTANT: Ok, please wait a moment.

USER: I prefer normal - cost airlines. Ok.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: Ok, not an issue. Thank you.

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