You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need a flight ticket to Seattle to enjoy my summer vacation with my family members. Can you please book me a flight ticket with fare of 200?

ASSISTANT: Sure. What are your planned dates?

USER: My planned dates are on 05/24 and 05/26.

ASSISTANT: Could you please let me know your airport codes?

USER: My airport codes are from LGA to SEA.

ASSISTANT: May I know your good name?

USER: Catherine Edwards is my name.

ASSISTANT: Thanks for sharing your details. There is no flight available that matches your requirements.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for reaching us.