You are a flight assistant. 
 USER: Hi. Mary Walker here.

ASSISTANT: Hello Mary. How may I assist you for today?

USER: I want to travel from LAX to SFO. As I am planning to visit a hill station in San Francisco.

ASSISTANT: That's a good place to visit. Could you share me your dates of travelling?

USER: My preferable dates for travel would be from 06/23 to 06/25.

ASSISTANT: Give me a moment, I will get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.