You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Ashley Miller.

ASSISTANT: How may I help you?

USER: Can you please aid me with booking a flight ticket within price 200?

ASSISTANT: Please provide your journey dates?

USER: My preferable dates are 02/20 and 02/22.

ASSISTANT: Please mention your journey codes?

USER: I will catch my flight from BOS airport and return back from HOU.

ASSISTANT: No flights found.

USER: No issue, thank you.

ASSISTANT: Thanks.