You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Can you please help me in booking a flight ticket from BOS to OAK?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travel dates are from June 07 to June 09.

ASSISTANT: Do you have any limit on number of connections?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your class preference?

USER: I would prefer economy class for my trip.

ASSISTANT: Let me know your departure and arrival timings.

USER: I would like to return in the evening.

ASSISTANT: Can I know your airline preference for your trip?

USER: I don't have any airline preference.

ASSISTANT: Please, share me your name to proceed further.

USER: Myself Gregory Williams.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to say that, we have not found any flights running on your desired routes.

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

ASSISTANT: Thanks for opting us.