You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Emily Moore. I would like to book a flight which depart in the evening. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you about that Emily Moore. Can you please provide your planned dates of journey?

USER: Sure, my travelling dates are Aug 20 and Aug 22.

ASSISTANT: Can you please let me know your respective location codes of journey?

USER: Sure, my airport codes are OAK and SEA.

ASSISTANT: Do you have any other preferences about your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I have already mentioned above.

ASSISTANT: Ok, please wait for sometime to check the suitable flight for your journey.

USER: Sure.

ASSISTANT: I regret to say this Emily Moore, there are no flights which can travels to your region as per your requirements.

USER: No worries, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us.