You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to travel from DFW to LGA. Can you help me to book a flight ticket?

ASSISTANT: Sure, when do you want to start and return on?

USER: I want to travel in the flight on Apr 07 and Apr 09.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: Raymond Garcia.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.