You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Emma Smith here. I would like to book a ticket from PHL and ATL.

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

USER: My travel dates are as follows, Dec 23 and Dec 25.

ASSISTANT: Do you have any connection limits?

USER: I would like to go for a single connection.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flights available.

USER: No problem, thank you for the information.

ASSISTANT: Most welcome.