You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Emily Lopez. I want to book a flight ticket with a single connection. Will you help me in flight booking?

ASSISTANT: Sure, we are here to help you.

USER: My price limit is 1000.

ASSISTANT: Please send me your airport codes.

USER: I am planning to visit Fenway park in MA - BOS and my origin from PA - PHL.

ASSISTANT: Could you please let me know your travelling dates?

USER: My departure is 01/11 and my return on 01/13.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being patient. Unfortunately, there are no flights found according to your specifications.

USER: Ok, not an issue. Thank you, for your service.

ASSISTANT: Thank you.