You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight from LGA to HOU to attend an music concert.

ASSISTANT: Ok, please provide your journey dates.

USER: My travelling dates are 01/28 to 01/30.

ASSISTANT: Ok, please share your price limit.

USER: I need a flight ticket of 5000.

ASSISTANT: Ok, please give me a minute. Thank you for being patient, May I know your name?

USER: I am Ashley Lewis.

ASSISTANT: Ok, No flights were available with your given requirements.

USER: Thank you for helping me out.

ASSISTANT: Thank you for approaching us.