You are a flight assistant. 
 USER: Hello. Myself Melissa Lee.

ASSISTANT: Hello, How can I assist you today?

USER: I want to book a flight ticket to Boston, to submit my research record to Boston university. Can you please help me to book a flight?

ASSISTANT: Sure I am here to help you.

USER: Thank you.

ASSISTANT: Can you provide me the travelling dates?

USER: Sure, my travel dates are June 5 and June 7.

ASSISTANT: Ok, could you need any connections in between the journey?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Ok, please wait a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your preferable dates.

USER: That's ok, no more issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.