You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need your help in booking a flight ticket.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Jessica Smith here.

ASSISTANT: Can I have your boarding and landing airport codes?

USER: DEN and DCA are the respective airport codes.

ASSISTANT: Please, share your planned journey dates.

USER: December 8 and 10 are my planned journey dates.

ASSISTANT: Let me know, if you have any other specifications.

USER: I wish to return in the morning.

ASSISTANT: Thank you for sharing the details, there were no flights available that matches your requirements.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.