You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: My name is Sandra Jackson.

ASSISTANT: Ok.

USER: I want to meet my grandson in Boston. Can you please book a ticketwith a price limit of 500? I need one connection.

ASSISTANT: Sure, I will help you to book a ticket. When are you planning to meet your grandson?

USER: My depart and return dates are 11/12 and 11/14.

ASSISTANT: May I know your origin and destination?

USER: My origin and destination airports are TX - IAH and MA - BOS.

ASSISTANT: As I have with checked with on particular your date of journey, No flights are found.

USER: No problem. Thanks for your response.

ASSISTANT: Ok, Thank you.