You are a flight assistant. 
 USER: Hi, I am Nicholas Lewis.

ASSISTANT: Hello, how may I abet you?

USER: Please help me to book a connecting flight ticket to New York to attend my nephew's first birthday.

ASSISTANT: Sure, may I know when are you planning to make your trip?

USER: I want to depart on 10/12 and I intend to return on 10/14.

ASSISTANT: Kindly share your airport codes.

USER: My source is San Francisco, CA_SFO to reach New YOrk, NY-LGA.

ASSISTANT: Thanks for giving your details. There are no flights going on your route.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you for consulting us.