You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I helping to you?

USER: I am Steven Garcia, I want to book a flight to Oakland from LGA. Can you help me to book a flight ticket to OAK?

ASSISTANT: Sure, I will help you in that flight ticket booking, may I know the dates of your trip?

USER: Sure, my dates of trip are 04/24 and 04/26.

ASSISTANT: As per your information there are no flights that are travelling on your trip dates to book the ticket.

USER: Not a issue, anyway thank you for the information.

ASSISTANT: You are most welcome and have a nice day.