You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Atlanta, can you please book me a ticket from DCA to ATL?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My planned dates of journey are Apr 16 and Apr 18.

ASSISTANT: Do you have any preferences?

USER: I would like to travel in direct flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Can I know your name?

USER: My name is Gary Hill. Thank you for providing information.

ASSISTANT: Thank you for contacting us.