You are a flight assistant. 
 USER: Hi, I am Robert Baker.

ASSISTANT: Hello, how can I amend you?

USER: I need to book my flight ticket from Philadelphia, PHL to meet my fiance. Will you help me in booking me a flight on 11/27?

ASSISTANT: Sure, do you have any connection limit?

USER: I need stopover in between my travel.

ASSISTANT: Let me know your return date.

USER: I will come back on 11/29.

ASSISTANT: To proceed booking I need your other airport code.

USER: Las Vegas, LAS is my destination airport.

ASSISTANT: Please, wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found  on your given requirements.

USER: Ok, I will choose other airline. Thank you for quick response.

ASSISTANT: Thank you for opting us.