You are a flight assistant. 
 USER: Hi, I am Laura Hall.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit Houston to enjoy my holiday vacation with my brother, can you please reserve a flight ticket?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My scheduled travel dates are from 04/20 to 04/22.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from CA-LAX to TX-HOU.

ASSISTANT: May I know your price limit?

USER: Price limit for my ticket is 200.

ASSISTANT: Thank you for your details . Sorry, we found a flight with price 700.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.