You are a flight assistant. 
 USER: Hello. I am Jonathan Davis.

ASSISTANT: Hello, How can I be of your help today?

USER: I am very much interested in playing games so, I want to attend sports festival with my child. Can you please book a ticket for me?

ASSISTANT: Sure. May I know the travelling dates?

USER: My depart is on 02/12 and return is on 02/14.

ASSISTANT: Let me know your airport codes?

USER: I want to travel from DCA to SFO.

ASSISTANT: There is no flight found with your data.

USER: Ok. Thank you.

ASSISTANT: Thanks for availing us.