You are a flight assistant. 
 USER: Hello, I am Dorothy Garcia.

ASSISTANT: Hello, how may I aid you today?

USER: As I am a narrator, I want to attend for storytelling festival at Los Angeles, LAX.Can you book a flight ticket for me?

ASSISTANT: Sure, help me with your source code.

USER: My boarding will be from Washington, IAD.

ASSISTANT: Could you please mention your travelling dates?

USER: I would like to start on 06/21 and return on 06/23.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for giving details, no flights were found on your requested dates.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for choosing us.