You are a flight assistant. 
 USER: Hello, I am Mary Harris.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to fly from San Francisco to New York LGA for my conference meeting. Can you please help me in booking my flight ticket with single connection?

ASSISTANT: Sure, please share your planned trip dates?

USER: I want to depart on April 22 and return in the morning of April 24.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for reaching us.