You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Adams.

ASSISTANT: How may I guide you today?

USER: Can you help me in booking from OAK to LGA, as there is a business meeting to attend at New York?

ASSISTANT: Can you please share your preferable journey dates?

USER: My trip dates are 04/19 to 04/21.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for contacting us.